The J-Quant Oil Quality Test Strips 0-2.5% and 0-6% are easy to semi-quantitatively measure cooking oil's free fatty acid content. They require no pre-sampling and can be used directly in the cooking oil whilst hot.
- An indication of 2% free fatty acid in cooking oil shows that the breakdown process has begun
- An indication of 4% free fatty acid means that the quality of breaded foods such as chicken and fish should be checked. The oil should be discarded if unacceptable
- An indication of 6% free fatty acid means that the quality of all other fried (battered) foods including chicken, fish, and chips/fries should be checked. The oil should be discarded if unacceptable
- If an extremely bright yellow color is observed, then this indicates that the free fatty acid level is much higher than 6% and the oil should be discarded immediately